package com.xuemeng.util;


import cn.afterturn.easypoi.excel.ExcelExportUtil;
import cn.afterturn.easypoi.excel.ExcelImportUtil;
import cn.afterturn.easypoi.excel.entity.ExportParams;
import cn.afterturn.easypoi.excel.entity.ImportParams;
import cn.afterturn.easypoi.excel.entity.enmus.ExcelType;
import com.xuemeng.task.ScheduledService;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.Workbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Lookup;
import org.springframework.util.ClassUtils;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URLEncoder;
import java.util.Calendar;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;


/**
 * @author xuemeng
 * @date 2018/12/16 15:10
 */
public class Execl {

        private final static Logger logger = LoggerFactory.getLogger(ScheduledService.class);

        public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, boolean isCreateHeader, HttpServletResponse response) {
                ExportParams exportParams = new ExportParams(title, sheetName);
                exportParams.setCreateHeadRows(isCreateHeader);
                defaultExport(list, pojoClass, fileName, response, exportParams);

        }

        public static void exportExcel(List<?> list, String title, String sheetName, Class<?> pojoClass, String fileName, HttpServletResponse response) {
                defaultExport(list, pojoClass, fileName, response, new ExportParams(title, sheetName));
        }

        public static void exportExcel(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
                defaultExport(list, fileName, response);
        }

        private static void defaultExport(List<?> list, Class<?> pojoClass, String fileName, HttpServletResponse response, ExportParams exportParams) {
                Workbook workbook = ExcelExportUtil.exportExcel(exportParams, pojoClass, list);
                if (workbook != null) {
                        downLoadExcel2(fileName, response, workbook);
                }
        }

        private static void downLoadExcel(String fileName, HttpServletResponse response, Workbook workbook) {
                try {
                        response.setCharacterEncoding("UTF-8");
                        response.setHeader("content-Type", "application/vnd.ms-excel");
                        response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName, "UTF-8"));
                        workbook.write(response.getOutputStream());
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }

        private static void downLoadExcel2(String fileName, HttpServletResponse response, Workbook workbook) {
                //获取跟目录
                String path = ClassUtils.getDefaultClassLoader().getResource("").getPath();
                logger.info("当前路径是：" + path);
                if (workbook != null) {
                        try {
                                FileOutputStream fos = new FileOutputStream(path + "/" + fileName);

                                workbook.write(fos);
                        } catch (IOException e) {
                                e.printStackTrace();
                                System.out.println("IOException++====" + fileName);
                        }
                }
        }

        private static void defaultExport(List<Map<String, Object>> list, String fileName, HttpServletResponse response) {
                Workbook workbook = ExcelExportUtil.exportExcel(list, ExcelType.HSSF);
                if (workbook != null) {
                        downLoadExcel(fileName, response, workbook);
                }
        }

        public static <T> List<T> importExcel(String filePath, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
                if (StringUtils.isBlank(filePath)) {
                        return null;
                }
                ImportParams params = new ImportParams();
                params.setTitleRows(titleRows);
                params.setHeadRows(headerRows);
                List<T> list = null;
                try {
                        list = ExcelImportUtil.importExcel(new File(filePath), pojoClass, params);
                } catch (NoSuchElementException e) {
                        throw new NoSuchElementException("模板不能为空");
                } catch (Exception e) {
                        e.printStackTrace();

                }
                return list;
        }

        public static <T> List<T> importExcel(MultipartFile file, Integer titleRows, Integer headerRows, Class<T> pojoClass) {
                if (file == null) {
                        return null;
                }
                ImportParams params = new ImportParams();
                params.setTitleRows(titleRows);
                params.setHeadRows(headerRows);
                List<T> list = null;
                try {
                        list = ExcelImportUtil.importExcel(file.getInputStream(), pojoClass, params);
                } catch (NoSuchElementException e) {
                        throw new NoSuchElementException("excel文件不能为空");
                } catch (Exception e) {
                        e.getMessage();
                }
                return list;
        }

}
